What do I need to use Unit Economics?

ARPA; Gross margin %; Churn %; CAC.

Is Unit Economics free to use?

Yes — run it free in the browser playground (no API key needed for the sponsored trial, or bring any provider key), or install it into Claude Code, Cursor, ChatGPT and more via npx pm-claude-skills. MIT-licensed and open source.

Unit Economics

Q: How do I know the Unit Economics output is good?

The skill verifies itself against its own quality checks: LTV uses gross margin, not raw revenue (a common, model-breaking error); The numbers are computed by the helper, not eyeballed; Verdict is stated against the standard benchmarks (LTV:CAC ≥ 3, payback < 12mo); The biggest lever is identified with its rough effect.

🔵 Stable🕐 updated 2026-06-27 🔷 SkillSpec L3 ⚙ ships an executable helper pm-calculators

Model the unit economics of a business — CAC, LTV, payback, contribution margin — from real inputs. Use when asked to calculate unit economics, work out LTV:CAC, find the payback period, or check whether a business model is viable per customer. Produces a computed unit-economics summary (LTV, CAC, ratio, payback, contribution margin) with a verdict and the levers that move it most.

📚 Based on SaaS unit economics — David Skok / for Entrepreneurs (margin LTV, LTV:CAC, payback)

▶ Run it free — no key needed 📝 Grade your existing draft View SKILL.md ↗

What to give it

▸ARPA — average revenue per account, per month (or per period).

▸Gross margin % — the share of revenue left after cost-to-serve.

▸Churn % — monthly customer (or revenue) churn — drives LTV.

▸CAC — fully-loaded cost to acquire a customer (sales + marketing ÷ new customers).

✅ The bar it holds itself to

Every skill in this library self-verifies — these are this skill's own quality checks, straight from its definition.

✓LTV uses gross margin, not raw revenue (a common, model-breaking error)

✓The numbers are computed by the helper, not eyeballed

✓Verdict is stated against the standard benchmarks (LTV:CAC ≥ 3, payback < 12mo)

✓The biggest lever is identified with its rough effect

✓Assumed inputs are flagged separately from measured ones

⚠️ What it refuses to do

Do not compute LTV on revenue instead of gross margin — it inflates LTV and hides an unviable model

Do not ignore payback — a great LTV:CAC with a 30-month payback can still starve a business of cash

Do not treat blended CAC as paid CAC — separate organic from paid or the model lies

Do not present assumptions as facts — label estimated churn/CAC and validate them

Do not optimise the smallest lever — model which input actually moves the outcome

Install

npx pm-claude-skills add --agent claude   # or codex · cursor · gemini · hermes
# or one-line MCP (every skill, any client):
claude mcp add pm-skills -- npx -y pm-claude-skills-mcp

Related skills

🔌 Embed this skill

Drop this on your blog, docs, or site — it renders a "Run this skill" card:

<div data-pm-skill="unit-economics"></div>
<script src="https://mohitagw15856.github.io/pm-claude-skills/embed.js" async></script>

💬 Discussion

Unit Economics is one of 599 open-source professional AI agent skills — all SkillSpec L3. Try them all in the browser · ⭐ Star on GitHub · Browse the full catalog